Snowy Mountains 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
19
20
21
22
23
24
low
25
low
26
med
27
med
28
low
29
low
30
31
low
Feb 1
2
3
low
4
5
6
low
7
8
9
10
med
11
12
13
low
14
low
15
Chance of rainfall within district
nil
< 25%
low
25% to 50%
med
50% to 75%
high
≥ 75%

Issue Notes

The hemispheric long wave pattern has been relatively slow moving in recent weeks. There are seven main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, eastern Australia, New Zealand, the southeast Pacific, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 24 January to 28 January, 9 February to 13 February, and 16 February to 20 February. Rain events originating in the tropics and moving south are possible about 27 January to 31 January, 16 February to 20 February, and 20 February to 24 February.
Over Western Australia the strongest cold fronts should occur about 24 January to 28 January.

Issued Jan 18

Forecast Explanation

This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

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